Separate the ingredients from the food salt and sand
mixture by working with a pen and answer the following
questions
Which methods have been used in this test?
Describe the sequence of work
Explain your observations and decision of the test.
What precautions have you taken in
Answers
We can separate the mixture of salt and sand by sedimentation, filtration and evaporation.
Tools:
Two beaker
funnel
spoon
precautions:
Although sand and salt aren't volatile chemicals, it will hurt if you let any of it get in your eyes.
Exercise caution when handling Bunsen Burner.
Do not touch the hot beaker.
Wash your hands after conducting the experiment.
steps:
salt and sand mixture
Collect sufficient amount of sand and salt in different glasses.
Transfer two tablespoon of salt to the glass containing sand.
Stir the Salt-Sand mixture well with a spoon .
Take a bottle
Remove the bottle cap and cut the bottle in half using a cutter.
Place the upper half of the bottle inverted on the lower half.
Place a filter paper in the inverted part of the bottle. This acts like a funnel.
sedimentation and filtration
Add water to the sand-salt mixture. Wait till the sand settles down (Sedimentation).
Gently pour the mixture into the empty bottle through the funnel (Filtration).
evaporation
Salt solution gets filtered down the funnel and is collected at the bottom of the bottle leaving the sand particles in the filter paper.
Collect the sand in a beaker and keep it aside.
Take the salt solution (filtrate) in a beaker and heat it.
salt residue
Heat until the water evaporates leaving the salt behind.
observation: the water evaporates and salt will be left.
hope it helps........
